Convert to nix flake; fix systemd service to use nix run

- Add flake.nix with nixos-unstable nixpkgs, devShell and slopbot package
- Add flake.lock
- Update .envrc to 'use flake .'
- Update slopbot.service: use 'nix run' instead of nix-shell, remove
  broken sandbox options (ProtectHome, InaccessiblePaths, ProtectSystem,
  ReadOnlyPaths, ReadWritePaths, PrivateTmp) that block nix store access
- Delete shell.nix
- Add 'result' to .gitignore
- Restore openai to requirements.txt (was accidentally dropped)

1 files changed, 0 insertions, 17 deletions

diff --git a/shell.nix b/shell.nix
deleted file mode 100644
index fcc0bd7..0000000
--- a/shell.nix
+++ /dev/null
@@ -1,17 +0,0 @@
-{ pkgs ? import <nixpkgs> {} }:
-
-pkgs.mkShell {
-  buildInputs = [
-    (pkgs.python3.withPackages (ps: [
-      ps.zulip
-      ps.yfinance
-      ps.openai
-      ps.requests
-    ]))
-  ];
-
-  shellHook = ''
-    echo "slopbot dev shell ready"
-    echo "Run: python main.py"
-  '';
-}